files/en-us/web/mathml/reference/element/munder/index.md
The <munder> MathML element is used to attach an accent or a limit under an expression. It uses the following syntax: <munder> base underscript </munder>
This element's attributes include the global MathML attributes as well as the following attribute:
accentunder
<boolean> indicating whether the under script should be treated as an accent (i.e., drawn bigger and closer to the base expression).<math display="block">
<munder accentunder="true">
<mrow>
<mi>x</mi>
<mo>+</mo>
<mi>y</mi>
<mo>+</mo>
<mi>z</mi>
</mrow>
<mo>⏟<!--BOTTOM CURLY BRACKET--></mo>
</munder>
</math>
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